Manual tapping device, equipment and method for long overhanging screw tap

Abstract

The invention relates to the technical field of machining, in particular to a long overhanging screw tap manual tapping device, equipment and method. The screw tap comprises a taper shank and a blade which are connected; positioning holes are formed in the positioning mechanism and comprise a taper shank positioning hole and a blade positioning hole; during tapping, a screw tap penetrates through the positioning hole and extends to the tapping hole, the taper shank is in clearance fit with the taper shank positioning hole, and the blade is in clearance fit with the blade positioning hole; the outer wall of the positioning mechanism is attached to the side wall of the part to be tapped. A taper shank of the screw tap is in clearance fit with a taper shank positioning hole of the positioning mechanism, and it is guaranteed that the taper shank does not deflect in the tapping process. The cutting edge of the screw tap is in clearance fit with the cutting edge positioning hole of the positioning mechanism, so that deviation of the positioning mechanism caused by hole edge protrusion, small scrap iron and the like during tapping can be avoided, and the tapping accuracy and precision are improved. The problem that the tapping quality and efficiency are affected due to deflection of a manual tapping screw tap of an existing long overhanging screw tap is solved.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical processing, and in particular to a manual tapping device, equipment and method for a long overhang tap. Background Art

[0002] In the machining industry, threaded holes are the basis for the installation of connectors (such as bolts and nuts). Through threaded connections, mechanical parts can be fastened and assembled. If the processing quality of threaded holes is poor, such as thread deflection and uneven pitch, it will directly affect the installation and fastening effect of connectors, and even cause connection failure. In the machining industry, common methods for processing threaded holes include boring, thread rolling and tapping. Boring is a method of using a boring tool to process internal threads on a workpiece. Boring has the advantages of high processing accuracy and good surface quality, but the cost is high and it is only suitable for threaded hole processing with larger diameters and depths. Thread rolling is a method of using a rolling tool to roll internal threads on a workpiece. Thread rolling has the advantages of high processing efficiency, high thread strength, and good surface quality, but the equipment cost is high and it is suitable for mass production and processing of large-diameter threaded holes. Tapping is the process of using the cutting edge of a tap to gradually remove material from the workpiece to form an internal thread. A tap is a tool with a spiral groove, and its cutting edge is distributed along the spiral groove. When the tap rotates and feeds axially, the cutting edge will cut the workpiece material to form a thread. Tapping has the advantages of simple operation and low cost, and is widely used in various mechanical manufacturing fields, such as automobile manufacturing, aerospace, electronics industry, military industry and other fields.

[0003] However, in certain specific part structures, the overhang length of the tap has to be lengthened due to space limitations or design requirements. Manual tapping with a long overhang tap refers to using a tap with a longer overhang to manually rotate the tap to produce an internal thread on the workpiece. This processing method is characterized by flexible operation, but due to the slender structure of the tap, it is easy to bend and deform when subjected to cutting force, which in turn causes deflection during the tapping process. This deflection not only affects the processing accuracy of the threaded hole, causing the axis of the threaded hole to deviate from the ideal position, but also increases the friction between the tap and the workpiece, reduces cutting efficiency, and even causes damage to the tap. Therefore, in this case, the stability of the tap becomes an issue that needs to be urgently addressed.

[0004] To solve this problem, engineers have conducted a lot of research and attempts. They have tried to reduce the tap runout by improving the structural design of the tap, optimizing cutting parameters, and improving the accuracy of processing equipment. However, these methods are often limited by actual processing conditions and it is difficult to completely eliminate the tap runout problem.

[0005] The Chinese invention patent with the authorization publication number CN113210755A discloses a tapping assembly and a tapping method, which relates to the field of mechanical production and processing technology. A tapping assembly includes a tap handle, the right side wall of the tap handle is evenly fixedly connected with a blade, the left end of the blade is provided with a back angle, the outer wall of the tap handle is slidably connected with a sleeve, and the left end of the sleeve is connected with a limit ring. Through the above method, the present invention inserts the sleeve into the thread bottom hole, accurately locates the center of the tap, quickly straightens the back angle, and is not limited to the specific structure of the tapping outer surface. Then the back angle pre-opens the thread groove of the thread bottom hole, and finally the blade continues to tap the pre-opened thread groove of the thread groove. It can quickly perform manual tapping on small batches of workpieces or large workpieces, ensuring a one-time tapping pass rate of more than 99%, so as to solve the instability of manual tapping, and has low technical requirements for the operator. However, this method is still limited by the overhang length of the tap, and the problem of the deflection of the long overhang tap is still difficult to solve.

[0006] The Chinese invention patent with the authorization publication number CN103894685B discloses a tapping control device and a tapping control method. It includes: a spindle motor driving component, a feed shaft motor driving component and a calculation component. The spindle motor driving component drives the spindle motor that rotates the tap. The feed shaft motor driving component drives the feed shaft motor that moves the tap in the feed direction along the axis and the return direction opposite to the feed direction. The calculation component calculates a part of the torque value of each speed of the spindle motor differently based on the maximum speed of the spindle motor and the pitch of the tap along the axis, according to the moving direction of the tap based on the feed shaft motor. Then, based on the result calculated by the calculation component, the tapping process is performed. This method mainly reduces the deflection of the tap by controlling the cutting force and cutting speed during the tapping process. However, this method requires a high technical level of the operator, and it is difficult to accurately control the changes in cutting force and cutting speed during the actual processing process, and the problem cannot be solved from the root.

[0007] Therefore, the tap runout problem is still the main problem affecting the quality and efficiency of manual tapping with long overhang taps. In the actual processing process, how to effectively reduce the tap runout and improve the processing accuracy and efficiency of threaded holes is still an important research direction. Summary of the invention

[0008] In view of the problem in the prior art that manual tapping with long overhang taps suffers from tap deflection, which affects tapping quality and efficiency, the present invention provides a manual tapping device, equipment and method for manual tapping with long overhang taps.

[0009] In order to achieve the above object, the present invention adopts the following technical solutions: The present invention provides a manual tapping device with a long overhanging tap, comprising a tap and a positioning mechanism; The tap comprises a taper shank and a blade, wherein the blade is connected to the taper shank; The positioning mechanism is provided with positioning holes inside, the positioning holes include a cone handle positioning hole and a blade positioning hole, and the cone handle positioning hole and the blade positioning hole are connected to each other; When tapping, the tap passes through the positioning hole and extends to the tapping hole, the taper shank is gap-matched with the taper shank positioning hole, and the blade is gap-matched with the blade positioning hole; the outer wall of the positioning mechanism is in contact with the side wall of the part to be tapped.

[0010] Optionally, the fitting clearance between the tapered shank and the tapered shank positioning hole is 0.02-0.04 mm.

[0011] Optionally, the fitting clearance between the blade and the blade positioning hole is 0.03-0.06 mm.

[0012] Optionally, the front end of the blade is provided with a chamfer.

[0013] Optionally, the length of the tapered shank positioning hole is greater than the length of the tapered shank.

[0014] Optionally, the tap further comprises a handle, wherein the handle is connected to the taper shank, and a wrench connecting portion is provided on the handle.

[0015] Optionally, the wrench connecting portion is a wrench connecting key arranged at the end of the handle.

[0016] Optionally, the wrench connecting portion is a wrench connecting hole opened on the handle.

[0017] A tapping device comprises the above-mentioned long overhang tap manual tapping device.

[0018] A method for manually tapping a long overhang tap using the above device comprises: Install the tap into the positioning hole inside the positioning mechanism; Align the positioning hole with the tapping hole, and press the positioning mechanism tightly to make the positioning mechanism stationary relative to the part; Turn the tap to tap until the desired tapping depth is reached to complete manual tapping.

[0019] Compared with the prior art, the present invention has the following beneficial effects: The present invention discloses a manual tapping device for a long overhanging tap, comprising a tap and a positioning mechanism; by matching the taper shank of the taper with the taper shank positioning hole of the positioning mechanism, it is ensured that the taper shank does not swing during the tapping process; by matching the blade of the taper with the blade positioning hole of the positioning mechanism, the setting of the blade positioning hole can also prevent the positioning mechanism from being offset due to hole edge protrusions, fine iron filings, etc. generated during tapping, thereby ensuring the precise positioning of the tap during the tapping process, preventing the tap from being deflected or shaken during tapping, thereby improving the accuracy and precision of tapping. At the same time, the clearances between the taper shank and the taper shank positioning hole, and between the blade and the blade positioning hole, enable the tap to move smoothly during the tapping process, reduce friction and resistance, thereby improving the tapping efficiency. This design also reduces the wear of the tap during the tapping process and extends the service life of the tap. By making the outer wall of the positioning mechanism fit with the side wall of the part to be tapped, this design enhances the stability between the positioning mechanism and the part, prevents the positioning mechanism from moving or shaking during the tapping process, and further improves the stability of the tapping. The stable positioning mechanism can also reduce the cutting heat generated by vibration, which is conducive to maintaining the sharpness of the cutting edge and extending the service life. In addition, this design is not only simple in structure, low in processing cost, and improves the tapping quality, but also greatly simplifies the operation process, making manual tapping more convenient, reliable, and more efficient.

[0020] The matching clearance between the taper shank and the taper shank positioning hole is precisely controlled between 0.02 and 0.04 mm, which not only ensures the flexible rotation of the tap in the positioning hole, but also ensures the stability and accuracy of the tap during the rotation process, avoiding shaking and deviation caused by excessive clearance, thereby improving the tapping accuracy. At the same time, this also reduces the friction between the tap and the positioning hole, and prolongs the service life of the tap and the positioning mechanism.

[0021] The clearance between the blade and the blade positioning hole is controlled between 0.03 and 0.06 mm. Reasonable clearance between the blade and the blade positioning hole not only ensures effective cutting of the blade during tapping, but also avoids jamming or wear caused by too small a clearance, thereby ensuring the stability and cutting efficiency of the blade during tapping and extending the service life of the blade.

[0022] The chamfer at the front end of the blade can effectively reduce the contact area and resistance in the initial stage of tapping, increase the sharpness of the blade, enable the tap to enter the tapping hole more smoothly, improve the efficiency and success rate of tapping, and protect the tap and parts from unnecessary damage. At the same time, the chamfer design can assist the positioning mechanism in rapid and accurate positioning, further improving the tapping efficiency.

[0023] The length of the taper shank positioning hole is greater than the length of the taper shank. By optimizing the length of the taper shank positioning hole, the tapping stability can be further improved. It enables the tap to always maintain a stable posture and cutting direction during the tapping process even if the tap is subjected to a large cutting force. This not only improves the tapping accuracy and efficiency, reduces the noise and wear caused by vibration, but also prolongs the service life of the tap with sufficient support.

[0024] The setting of the handle and the wrench connection greatly improves the operator's comfort and work efficiency. The handle design allows the operator to hold the tap more stably, reducing tapping errors caused by hand slippage or insufficient grip. The wrench connection facilitates the use of various wrench tools, improving the flexibility and scope of tapping. This design not only meets the needs of different operators, but also improves the convenience and efficiency of the entire tapping process.

[0025] The wrench connection part adopts a wrench connection key set at the end of the handle. By increasing the contact area and connection strength between the wrench and the tap, it ensures that the wrench will not fall off or deviate during the tapping process, reduces the safety hazards caused by the wrench loosening or slipping, avoids tapping errors caused by the wrench loosening or slipping, improves the stability and accuracy of the tapping process, and ensures the quality and efficiency of tapping. At the same time, the simple design of the wrench connection key also facilitates the operator's quick installation and removal.

[0026] The wrench connection part can also adopt a wrench connection hole opened on the handle, providing the operator with more choices and flexibility. Wrenches of different shapes can be easily connected to the tap as needed to meet the needs of different tapping scenarios. This design not only improves the efficiency and success rate of tapping, but also enhances the adaptability and flexibility of the entire tapping process.

[0027] The tapping device proposed by the present invention includes the above-mentioned long overhang tap manual tapping device. This combination enables the tapping device to have the characteristics of high precision, high efficiency and high stability. Through the ingenious combination of the positioning mechanism and the tap, the advantages and characteristics of the long overhang tap manual tapping device are fully utilized. Through the high-precision positioning mechanism and stable tap design, the tapping device can ensure the success rate and quality of tapping, is suitable for various mechanical processing fields, and has broad application prospects and market value.

[0028] A method for manually tapping a long overhang tap using the above device is provided, wherein the method comprises the following steps: installing the tap into the positioning hole inside the positioning mechanism; aligning the positioning hole with the tapping hole, pressing the positioning mechanism, and making the positioning mechanism stationary relative to the part; rotating the tap to perform tapping until the required tapping depth is reached, and completing the manual tapping. The method is simple to operate, can ensure the stability and accuracy of the tapping process, improve the tapping quality and tapping success rate, and has high tapping efficiency. It can be applied to various occasions requiring long overhang tapping, and has broad application prospects and practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 The present invention is a schematic cross-sectional structure diagram of a manual tapping device with a long overhang tap.

[0030] Figure 2 The present invention is a top view of a manual tapping device with a long overhang tap.

[0031] Among them, 1 is a tap, 2 is a positioning mechanism, 11 is a taper handle, 12 is a blade, 13 is a handle, 131 is a wrench connecting key, 132 is a wrench connecting hole, 21 is a positioning hole, 211 is a taper handle positioning hole, and 212 is a blade positioning hole. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0035] In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0036] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0037] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] The present invention is further described in detail below in conjunction with specific embodiments, which are intended to explain the present invention rather than to limit it.

[0039] Example 1 Reference Figure 1 and Figure 2 The present invention discloses a manual tapping device for a long overhang tap, comprising a tap 1 and a positioning mechanism 2; the tap 1 comprises a taper shank 11 and a blade 12, and the blade 12 is connected to the taper shank 11; a positioning hole 21 is provided inside the positioning mechanism 2, and the positioning hole 21 comprises a taper shank positioning hole 211 and a blade positioning hole 212, and the taper shank positioning hole 211 and the blade positioning hole 212 are connected to each other; when tapping, the tap 1 passes through the positioning hole 21 and extends to the tapping hole, the taper shank 11 and the taper shank positioning hole 211 are clearance-matched, and the blade 12 and the blade positioning hole 212 are clearance-matched; the outer wall of the positioning mechanism 2 is in contact with the side wall of a part to be tapped.

[0040] By matching the taper shank 11 of the tap 1 with the taper shank positioning hole 211 of the positioning mechanism 2, it is ensured that the taper shank 11 does not swing during the tapping process. By matching the blade 12 of the tap 1 with the blade positioning hole 212 of the positioning mechanism 2, the setting of the blade positioning hole 212 can also prevent the positioning mechanism from being offset due to hole edge protrusions, fine iron filings, etc. generated during tapping, ensuring the precise positioning of the tap during the tapping process, preventing the tap 1 from deflecting or shaking during tapping, thereby improving the accuracy and precision of tapping. At the same time, the clearances between the taper shank 11 and the taper shank positioning hole 211, and the blade 12 and the blade positioning hole 212 enable the tap 1 to move smoothly during the tapping process, reducing friction and resistance, thereby improving the tapping efficiency. This design also reduces the wear of the tap 1 during the tapping process and extends the service life of the tap. By making the outer wall of the positioning mechanism 2 fit the side wall of the part to be tapped, the stability between the positioning mechanism 2 and the part is enhanced, the positioning mechanism 2 is prevented from moving or shaking during the tapping process, and the tapping stability is further improved.

[0041] Example 2 See also Figure 1 and Figure 2 The present invention provides a long overhang tap manual tapping device, including a tap 1, wherein the tap 1 includes a taper shank 11 and a blade 12, wherein the front end of the blade 12 is provided with a chamfer; the taper shank 11 and the blade 12 are provided in an integrated manner; the outer clearance of the tap 1 is matched with a positioning mechanism 2, wherein a positioning hole 21 is provided inside the positioning mechanism 2, wherein the positioning hole 21 includes a taper shank positioning hole 211 and a blade positioning hole 212 which are connected to each other, wherein the taper shank positioning hole 211 is clearance matched with the taper shank 11, wherein the clearance is 0.02-0.04 mm, preferably 0.03 mm, wherein the blade 12 is clearance matched with the blade positioning hole 212, wherein the clearance is 0.03-0.06 mm, preferably 0.04-0.05 mm, wherein the clearance between the blade 12 and the blade positioning hole 212 is greater than the clearance between the taper shank positioning hole 211 and the taper shank 11, so as to ensure stability during the tapping process. The length of the taper shank positioning hole 211 is greater than the length of the taper shank 11. During the tapping process, even if the tap is subjected to a large cutting force, the tap can always maintain a stable posture and cutting direction, which not only improves the tapping accuracy and efficiency, reduces the noise and wear caused by vibration, but also prolongs the service life of the tap due to sufficient support. The outer wall of the positioning mechanism 2 fits with the side wall of the part to be tapped, which can effectively enhance the stability between the positioning mechanism 2 and the part, prevent the positioning mechanism 2 from moving or shaking during the tapping process, and further improve the stability of the tapping. The stable positioning mechanism can also reduce the cutting heat generated by vibration, which is conducive to maintaining the sharpness of the cutting edge and prolonging the service life.

[0042] Example 3 See also Figure 1 and Figure 2 The present invention provides a manual tapping device for a long overhang tap, comprising a tap 1, wherein the tap 1 comprises a handle 13, and a taper shank 11 and a blade 12 connected to the handle in sequence, wherein the handle 13 is provided with a wrench connection portion. The wrench connection part is a wrench connection key 131 arranged at the end of the handle 13, and the front end of the blade 12 is provided with a chamfer; the cone handle 11 and the blade 12 are provided in an integrated manner; the outer clearance of the tap 1 is matched with a positioning mechanism 2, and the outer wall of the positioning mechanism 2 is tightly fitted with the side wall of the part, and a positioning hole 21 is provided inside the positioning mechanism 2, and the positioning hole 21 includes a cone handle positioning hole 211 and a blade positioning hole 212 that are connected to each other, and the cone handle positioning hole 211 and the cone handle 11 are clearance matched, and the clearance is 0.02-0.04mm, preferably 0.03mm, and the blade 12 and the blade positioning hole 212 are clearance matched, and the clearance is 0.03-0.06mm, preferably 0.04-0.05mm, and the clearance between the blade 12 and the blade positioning hole 212 is greater than the clearance between the cone handle positioning hole 211 and the cone handle 11, so as to ensure stability during tapping. The length of the cone handle positioning hole 211 is greater than the length of the cone handle 11.

[0043] Example 4 See also Figure 1 and Figure 2 The present invention provides a manual tapping device for a long overhang tap, comprising a tap 1, wherein the tap 1 comprises a handle 13, and a taper shank 11 and a blade 12 connected to the handle in sequence, wherein the handle 13 is provided with a wrench connection portion. The wrench connection part is a wrench connection hole 132 provided on the handle 13, and the front end of the blade 12 is provided with a chamfer; the taper shank 11 and the blade 12 are provided in an integrated manner; the outer clearance of the tap 1 is matched with a positioning mechanism 2, and the outer wall of the positioning mechanism 2 is closely fitted with the side wall of the part, and a positioning hole 21 is provided inside the positioning mechanism 2, and the positioning hole 21 includes a taper shank positioning hole 211 and a blade positioning hole 212 that are connected to each other, and the taper shank positioning hole 211 is clearance matched with the taper shank 11, and the clearance is 0.02-0.04mm, preferably 0.03mm, and the blade 12 is clearance matched with the blade positioning hole 212, and the clearance is 0.03-0.06mm, preferably 0.04-0.05mm, and the clearance between the blade 12 and the blade positioning hole 212 is greater than the clearance between the taper shank positioning hole 211 and the taper shank 11, so as to ensure stability during tapping. The length of the taper shank positioning hole 211 is greater than the length of the taper shank 11.

[0044] Example 5 See also Figure 1 and Figure 2The present invention provides a manual tapping device for a long overhang tap, comprising a tap 1, wherein the tap 1 comprises a handle 13, and a taper shank 11 and a blade 12 connected to the handle in sequence, wherein the handle 13 is provided with a wrench connection portion. The wrench connecting portion includes a wrench connecting hole 132 provided on the handle 13 and a wrench connecting key 131 provided at the end of the handle 13, the wrench connecting hole 132 is provided on the handle 13 below the wrench connecting key 131, and the front end of the blade 12 is provided with a chamfer; the cone handle 11 and the blade 12 are provided integrally; the outer clearance of the tap 1 is matched with a positioning mechanism 2, the outer wall of the positioning mechanism 2 is tightly fitted with the side wall of the part, and a positioning hole 21 is provided inside the positioning mechanism 2, the positioning hole 21 includes a cone handle positioning hole 211 and a blade positioning hole 212 which are interconnected, the cone handle positioning hole 211 is clearance matched with the cone handle 11, and the clearance is 0.02-0.04mm, preferably 0.03mm, the blade 12 is clearance matched with the blade positioning hole 212, and the clearance is 0.03-0.06mm. The clearance between the blade 12 and the blade positioning hole 212 is greater than the clearance between the taper shank positioning hole 211 and the taper shank 11, so as to ensure stability during the tapping process. The length of the taper shank positioning hole 211 is greater than the length of the taper shank 11, so as to ensure that the tap 1 can always maintain a stable posture and cutting direction during the tapping process even if subjected to a large cutting force.

[0045] The tapping device proposed by the present invention includes the above-mentioned long overhang tap manual tapping device. This combination enables the tapping device to have the characteristics of high precision, high efficiency and high stability. Through the ingenious combination of the positioning mechanism and the tap, the advantages and characteristics of the long overhang tap manual tapping device are fully utilized. Through the high-precision positioning mechanism and stable tap design, the tapping device can ensure the success rate and quality of tapping, is suitable for various mechanical processing fields, and has broad application prospects and market value.

[0046] The present invention provides a method for manually tapping a long overhang tap using the above device, comprising: S1: inserting the tap 1 into the positioning hole 21 inside the positioning mechanism 2; S2: Align the positioning hole 21 with the tapping hole, and press the positioning mechanism 2 to make the positioning mechanism 2 stationary relative to the part; S3: Turn tap 1 to perform tapping until the required tapping depth is reached, completing manual tapping.

[0047] The method is as follows: the tap 1 is installed into the positioning hole inside the positioning mechanism 2; the positioning hole 21 is aligned with the tapping hole, the positioning mechanism 2 is pressed, and the positioning mechanism is kept stationary relative to the part; the tap 1 is rotated to perform tapping until the required tapping depth is reached, and manual tapping is completed. The method is simple to operate, can ensure the stability and accuracy of the tapping process, improve the tapping quality and tapping success rate, and has high tapping efficiency. It can be applied to various occasions requiring long overhang tapping, and has broad application prospects and practical value.

[0048] In summary, the present invention provides a manual tapping device, equipment and method for a long overhang tap. It includes a tap and a positioning mechanism. By cleverly combining the tap and the positioning mechanism, the problems of shaking and offsetting of the long overhang tap during manual tapping are fundamentally solved, and the tapping accuracy and stability are significantly improved. By means of physical positioning, the tap and the part to be tapped are firmly locked, so that the operator can focus more on the rotation and cutting of the tap, thereby improving the overall work efficiency and processing quality. In addition, the device has a simple structure and is easy to operate, and is suitable for manual tapping operations in various complex environments.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to impose any limitation on the technical solution of the present invention. Those skilled in the art should understand that, without departing from the spirit and principles of the present invention, the technical solution can also be subjected to several simple modifications and substitutions, and these modifications and substitutions are also within the scope of protection covered by the claims.

Claims

1. A manual tapping device with a long overhang tap, characterized in that: It comprises a tap (1) and a positioning mechanism (2); The tap (1) comprises a taper shank (11) and a blade (12), wherein the blade (12) is connected to the taper shank (11); A positioning hole (21) is provided inside the positioning mechanism (2), the positioning hole (21) comprising a tapered handle positioning hole (211) and a blade positioning hole (212), the tapered handle positioning hole (211) and the blade positioning hole (212) being in communication with each other; When tapping, the tap (1) passes through the positioning hole (21) and extends to the tapping hole, the taper shank (11) is clearance-matched with the taper shank positioning hole (211), and the blade (12) is clearance-matched with the blade positioning hole (212); and the outer wall of the positioning mechanism (2) is in contact with the side wall of the part to be tapped.

2. The long overhang tap manual tapping device according to claim 1, characterized in that: The matching clearance between the tapered shank (11) and the tapered shank positioning hole (211) is 0.02-0.04 mm.

3. The long overhang tap manual tapping device according to claim 1, characterized in that: The matching clearance between the blade (12) and the blade positioning hole (212) is 0.03-0.06 mm.

4. The long overhang tap manual tapping device according to claim 1, characterized in that: The front end of the blade (12) is provided with a chamfer.

5. The long overhang tap manual tapping device according to claim 1, characterized in that: The length of the tapered shank positioning hole (211) is greater than the length of the tapered shank (11).

6. The long overhang tap manual tapping device according to claim 1, characterized in that: The tap (1) further comprises a handle (13), wherein the handle (13) is connected to the taper shank (11), and a wrench connection portion is provided on the handle (13).

7. The long overhang tap manual tapping device according to claim 6, characterized in that: The wrench connection portion is a wrench connection key (131) arranged at the end of the handle (13).

8. The long overhang tap manual tapping device according to claim 6, characterized in that: The wrench connection portion is a wrench connection hole (132) provided on the handle (13).

9. A tapping device, characterized in that: A manual tapping device with a long overhang tap comprising the device described in any one of claims 1 to 8.

10. A method for manually tapping a long overhang tap using the device according to any one of claims 1 to 8, characterized in that: include: Installing the tap (1) into the positioning hole (21) inside the positioning mechanism (2); Align the positioning hole (21) with the tapped hole, and press the positioning mechanism (2) to make the positioning mechanism (2) stationary relative to the part; Turn the tap (1) to tap until the desired tapping depth is reached, completing manual tapping.

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